Installation & Assembly
8
If you are uncomfortable working with electricity, running electrical supply 
wire or installing a circuit breaker, please consult a licensed electrician.
TROUBLESHOOTING
Heater 
doesn’t work 
at all.
1. Supply connections 
are loose.
2. Heater has tripped 
one of its high-tempera-
ture safety shutos.
3. Heater has tripped 
its secondary high-tem-
perature safety shuto.
4. Supply circuit is 
faulty.
1. Turn o power at main disconnect panel. Inspect and/or tighten 
all the wire connectors inside the heater and at any connection 
points inside junction boxes or at the wall thermostat. 
2. TO RESET: Turn power o at main disconnect panel. Allow 20 
minutes to cool. Make sure heater is not blocked and is clean. Re-
store power. If the high-temperature safety shuto trips more than 
once a day, replace the heater.
3. Replace heater. 
4. Call a licensed electrician.
Breaker trips 
immediately 
after install-
ing heater.
1. A short circuit exists 
in the electrical supply 
wires or heater wiring.
2. Circuit breaker and 
heater are not the same 
voltage. 
3. Circuit is overloaded.
4. Supply circuit is 
faulty.
1. An incorrect connection in the heater or electrical supply wires 
may cause sparking or arcing. Inspect all heater and electrical 
supply wiring insulation for damage or call an electrician.
2. Double check the voltage of the heater to make sure it matches 
the voltage of the circuit. Replace heater with a model that is 240 
volts.
3. Use a lower wattage heater, or reduce the number of heaters on 
the circuit. 
4. Call a licensed electrician.
Heater blows 
cold air or 
doesn’t get 
hot.
1. Element has failed.
2. Only one side heats 
and the other side 
has tripped one of its 
high-temperature safety 
shutos (Model CST 
only).
1. Replace heater.
2. TO RESET: Turn power o at main disconnect panel. Allow 20 
minutes to cool. Make sure heater is not blocked and is clean. Re-
store power. If the high-temperature safety shuto trips more than 
once a day, replace the heater.
Heater 
smells after 
installation 
or not being 
used.
1. Odor from element 
manufacturing process.
2. Dust or lint inside the 
heater.
3. Supply connections 
are loose.
1. In a new installation, some smoking may occur as the element 
initially burns o residue from manufacturing. It typically goes away 
within several hours.
2. Clean heater (see “MAINTAINING YOUR HEATER” on page 8 
for instructions).
3. Turn o power at main disconnect panel. Inspect and/or tighten 
all the wire connectors inside the heater and at any connection 
points inside junction boxes or at the wall thermostat.
Fan/motor 
doesn’t spin 
or spins slow.
1. Circuit breaker is 120 
volts and heater is 240 
volts. 
2. Defective motor or 
motor out of alignment.
1. Double check the voltage of the heater to make sure it matches 
the voltage of the circuit. Replace heater with a model that is 120 
volts.
2. Replace motor.
Heater 
doesn’t turn 
o.
1. Thermostat is de-
fective.
2. No thermostat 
hooked up to control 
heater.
3. Incorrect heater watt-
age for room size.
1. Replace thermostat.
2. A thermostat is required for all Com-Pak heaters. Purchase a 
built-in or wall thermostat for your heater.
3. Install higher wattage model or additional heaters if circuit 
allows.
High-temperature safety shuto
All Com-Pak heaters come with built-in high-temperature safety shutos that stop electricity flowing to 
the heater if it gets too hot inside. See TROUBLESHOOTING below if you’re experiencing problems 
with your heater.
   Symptom   Problem   Solution
 Rev 11/08/17 #730021
Reduce-Reuse-Recycle
This product is made primarily of recyclable materials. You can reduce your carbon footprint by recycling 
this product at the end of its useful life. Contact your local recycling support center for further recycling 
instructions.
©2017 Cadet Printed in USA 








